Cylinder grinder



Sept. 14 1926.

J. lJ. SCHMIDT ET AL CYLINDER GRINDER' Filed Jan. 18, 1922 anciana sept. 14', 1,926. 1,600,144

J. J. SCHMIDT ET AL CYLINDER GRINDER J. J. SCHMIDT ET AL CYLINDER GRINDER Filed Jan. 18, 1922 Sept. 14 1926'.

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l attoz mag e sheets-sheet 4 1 J. J. scHMlD-r Er AL CYLINDER GRINDER Filed Jan. 1a,- 1922 Sept. 14 1926.

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J. J. SCHMlDT ET AL CYLINDER GRINDER Filed Jan. 18, .1922

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cllmidt Ulrich Steiner* annue.

:lmnou J. Schmidt v8 Shades-Sheetl 8 Filed Jan. 18, .1922

J. J. SCHMIDT ET AL CYLINDER GRINDER sept. 14 1,926.`

J n q" Ulrich Steiner Patented Sept. 14, 1926.

narran sra'ras PATENT' enig,

JOHN J. SOHIJIDT, OF VAYNESBORO, PENNSYLVANIA, AND ULRICH`STENER, "OF

VANIA, A' CORPORATION PENNSYLVANIA.

CYLNDER GRNIDER.

implication filed January 18, 1922. lferial No.r 530,131'.

Our said invention relates to an improved cylinder grinder and it is an obgect or the same to provide a- Work-holder with im-V 26 Figure l is a front 'elevationot the improved machine,

`Figure 2 an elevation of the same taken from the right,

Figure 3 asimilar view on an enlarged ii." scale, Y

Figure l a detail or' parts shown in the preceding figures, 4 Y Figure 5 an enlarged front elevation or the Work-holder, .1111, Figure 6 an enlarged viev.7 of a cylinder gage used in connection With tie wor-lrholder,

Figure 6a a o'f Figure 6, A 1

Figure 7 a tace viev7 of the Worlrholder Vlooking toward the right in Figure l, part or the supporting trarne being shown in section.

sectionthereof on line 5--6 Figure 8 isan elevation on an enlargedY scale of a reversing device sho-Wn in Fig ure l,

Figure 9 a section on line0-9`ot ure 8,

Figure l0 a vertical longitudinal section oit the driving devices and bearings for theA snindle of the grinding Wheel,

Figure ll a detailview of an adjustable ing adjacent V,thev grinding Wheel., and igure l2 a section on line l2 of Fig l0. in the drawings reference character v2O indicates the foundation oi the machine which may be of any desirable or conventional character and may enclose Within it l'cated Vin iiXed bearings.

means is provided for revolving the sieeveV various elements oi' driving mechanism and the like asis customary in machines of this character. This frame carries i groups of mechanism or' vwhich the spindle carrying' and driving group is designated as a Whole by reference character A, the Work carrying Y group by reference character B and the carriage reversing devices'by reference char-A acterV C. K

efe'rring iirst to the bearing and driving devices for the grinding spindle 2l which carries at its forward end thegrinding wheel 227 these devices'include asupport 23 on the main orfoundation frame. rThis support has horizontal hearings 24 and 25 in .its upper port-ion in which is located a sleeve 26 having an eccentric bore in whichl is positioned second sleeve 27 also having an eccentric bore. The sleeve 26 ismounted for rotation in its bearings, being driven by a gear 28. A housing 29 eXtendsover said gear and is supported by bearings 24 vand The sleeve is held in place. by an integral annular shoulder at one end and ahousing 30 secured to the other end and resting Y against the bearing 24U` rlie sleeve 2? extends out-Ward beyond'the end oi" sleeve 26 at each end andhas adjacent one end a tapered portion 3l fitting in a correspondingly.v tapered portion oi seeve 2G. A split nut 32 has a threaded connection with the sleeve 27 and limits its movenient toward the left. At the other end a tapered bushing 33 surrounds the sleeve 27 engages an outwardly Haring portion of sleeve -'26, being held in place by 'a bolt lil passingthrough sleeve 26. 'A nut 36 on sleeve 2.7 serves to adjust the bushing endvfise when boit 34s is released and a nut iimits thel moveinent'o the bushing. At

' Y its right-hand endthe sleeve 2i' isA provided with a collarBS held inplace by a spline and a screw, said collar bear-ii ing a' Worm wheel. A Worm 39 meshes with said teeth Vthe ends of the Worm being lo- In this manner 2i" in the slee've26 thus changing the degree of eccentricity of the spindle, the parts being so arranged that the vspindle can never be quite concentric with the sleeve 26 the obiect being'to preclude any possibil" et grinding" a cylinder With a Wheel entirely filling the same'.

g teeth forin-` Y other passes over another idler mounted The bore of sleeve 27 is enlarged at both ends and contains at one end Ya ball-bearing forthe spindle shown in detail at Figure 10. The outer casing of the ball-bearing has a groove engaged by apin 89 carried b y the extension ofsleeve 27 to permit a slfght endwise displacement of spindle 21. it the other end 'the spindle is Surrounded by a sleeve 40 tapered at one end to within a tapered opening in the sleeve 27 and having screw-threaded connection tothe said sleeve. A bushing 41 is provided at one end of sleeve .40. At its other'end the sleeve 40Y is flared outwardly and in the flaring portion is positioned a tapered split bushing 42 surrounding a reduced portion of the shaft, the slot vin the bushing being wedge-shaped and having an expanding wedge 43 located therein. This wedge isadjustable longitudinally of the spindle by means of a` screw 44 havingan eccentric pin 44 (Figure 11) projecting into a transverse slot 45 of the wedge, and the screwhas threaded engagement with sleeve 40. The bushing carries at its rear end a nut 46 located between a loclrnut 47 threaded on the bushing and a shoulder 48 thereon, the 'nut having threaded engagement withfthe interior of sleeve 40. At the left end bushing 42 bears against a. shouldei` 49k on shaft 21 to steady the shaft and prevent chattering. The loclniut 47 projects within a guard 47 carrying the grinding wheel 22-thereby keeping dirt out of the bearing. For adjusting the outer bearing` of shaft 21 screw 44 is turned to withdrawY the wedge 43 and permit the bushing to be moved freely endwise. Movement of the bushing to the left by turning nut 46 brings the end of the bushing -against shoulder 49 and also compensates for internal wear on the bushing and the nut is locked by means of the lock nut 47. `When the bushing has been adjusted, screw 44 is turned to cause the wedge to again expand the bushing and so lock it in place. The pin and slot at 39 allows the spindle 21 to move in the direction of its length to a sufficient extent to permit proper adjustment of bushing 42 to compensate for wea-r between it and the spindle.

The driving` mechanism for the grinding wheel spindle 21 comprisesa pulley 50 on a shaft 58 driven by a belt 150, the latter forming the source of power for the maA chine. A larger pulley 51 on the same shaft drives the grinding wheel spindle through arpnlley 52 and belt 53. One run of this belt passes over an. idle pulley 54 vand the on a swinging braclret 56 pivoted at Y57 andl acting as a belt tightener. The shaft 58 cai'- rying the main pulley 51 also has fixed thereto a worin 59 (Fig. 3) driving a wori gear 60 on a shaft 61 having at the other end a beveled pinion 62, i

This .pinion in turnV drives a beveled pinion 63 on. a shaft 64, which also carries a gear 65 driving a pinion 66 (Figs. 1 and 4) on a shaft 67. Shaft- 67 also carries a pair of stepped pulleys 68 and 69 adapted by means of a belt 70 to drive either one of a pair of stepped pulleys 71v and 72 on a shaft 78 1 and 1U) which by means of a'pinion 74 meshing with gear 28 is adapted to drive the sleeve 26.

The-hand wheel 75 on the same shaft serves Y to drive the sleeve hand when required.

The shaft carrying the pinion v66 and the pulleys 68 and 69 is mounted in a swingingbracket 76 pivoted on the shafty64 and provided with a toggle'comprising links 77, 78 and 79. A hand lever 80 pivot-ed at'81is attached to link 79 and serves Jcooperate the toggle to raise the braclret 76 and slaclreii the belt or to lower it yinto driving position. A fixed segment 82 has a series of holes adapted to be engaged by a pin 837m order to hold the lever in adjusted position. The sin is adapted to be retracted by a fingen operated lever 84 movable into the locking positionby a spring 85.

The shaft 64 also carries a sprocket driving a sprocket .chain 86 passing over a sprocket 87 on a shaft 88 (Fig..9). Shafts 88, 89 and 90 are geared together and the latter shaft carries a worm 91 driving a worm wheel 92 looselyV journaled on a shaft 93 and pinned to sleeve 94y forming one member of a clutch. The other member 95 may be moved into and out of engagement; with member 94 by means not shown. TWhen the clutch members are in engagen'ien-U the shaft 93 drives the shaft 95 by means of a chain belt 96 passing over sprockets 97Y and 97. The shaft 95 carries a pinion 98' (Fig. 9) meshing with a raclr 98 (Figure to reciprocate the worlr carrier in well known fashion. The reversing gearing for changing the direction of movement .of the car riage may be similar to that shown in the application of Stoner No. 424,899 filed November 18, 1920, the dogging devices for cont-ron ling the same being somewhat simplified'.

The clogging devices include a hand wheely 99 which is fixed to shaft 98 for operating the same by hand, said shaft also having teeth cut into it at 100 providing a pinion to mesh with the teeth 101 on the dog wheel 102. This wheel has adjustable dogs 1t 'e in the above mentioned application which are adapted to strike alternately a lug 104 on a lever 105, the latter, being provided at 106, with manual operating means. This lever is fastened to a sleeve 107 on Vthe beaiing sleeve 108 of shaft 93 and at the inner side of the fra-me' is connected by a pin 109 to a sliding bar 110 adapted to be held in ,either one of two eXtreme positions by a yieldable detent 111.

This bar is connected to a clutch sleeve similar to that shown ai 24 in the application above referred to.

Vi a,

vfurther description.

@n the work carriage B which reciprocates longitudinally of the machine framer le have, however, provided novel means v for determining the proper vertical position This Vmeans comprises a pair of the block. of gages 118 slidably mounted on a bar 119 extending across the face of the work-holder. This bar is supported at its ends on fixed brackets 120, being precisely positioned and held in place by conical detents 121 engaging conical openings in the bar. One of said gages is shown in detail in 1Figure 5 and comprises a pair of legs 122 to straddle the bar 119 and a hoolr-lilre portion 123 adapted to extend `into a cylinder. Each leg of this part has a transverse opening in which is seated a movable cap 124. The caps 'are internally threaded and are adapted to be moved toward and from each other by a. screw having opposite threads at 125 and 126 and having at an intermediate point a nut 127 integral with or fixed -to the In the operation of our machinea cylinder bloclr is positioned on the workholder and fastened to the bars 116 and 117, the correct adjustment for aligning the end cylinders horizontally with the center of rotation of the sleeve 26 being determined by means of .on bar 119. After the bloclris locked in place the bar 119 withv the gages is removed from the workholderto permit access of the grinding wheel to the cylinders. The sleeve '27' is now adjusted to proper grinding position. It will be seen that the wheelV has two movements, one of rotation on its axis yand the other of revolution vabout the center vof rotation of the sleeve 26, the sleeve 26 being driven through its gear 28 and the spindle by its pulley 52 and both moving in the same direction. eccentric eeve having been properly adjusted to locate the grinding wheel, this posi` tion will automatically be preserved because 0f the self-locking character of the adjusting means, the worm and worm wheel being substantially or entirely irreversible so that the worm wheel will not drivethe worm'. .The

A pair of Set The . hand lever 8O is now operated to tighten the belt and thusdrive the spindle, the reciprocation of the Work. carriage being also initiated, after which the carriage ywill reciprocate and the wheel will grind the cylinder as desired.

After grinding the cylinder the support 1.12 is adjusted to bri-ng the next cylinder in line, or if preferred, the cylinder at the opposite end of the block may next be placed in line with the grinding' wheel after which the remaining'V cylinders are successively brought into grinding position. Should any of the cylinders be out of horizontal alignment as frequently happens proper alignment can be secured by manipulation of the adjusting screw 115. I

'lhe rotationofthe wheel and the reciprocationk of the work carriage may be independently 'arrested by means of lever S0 and manipulation of the clutch member 95. Each of them may also be independently actuated by the hand Wheels shown at 7 5 and 99. it will be evident to those Vskilled in the art that many changes may be made in our machine without departing from. the spirit of the invention,the true scope of the invention being indicated in the appended claims.

Having thus fully described our said invention, what we claim as new and desire to secure by Letters Patent, is:

1. An internal grinder comprising a spindle, a grinding wheel thereon, means for im-` parting planetary movement to the spindle,

means for adjusting the Aorbit'of the spindle,

and means to prevent identification of the respective axes of rotation and of revolution of the spindle, .substantially as set forth.

2. In a grinding machine asleeve having an eccentric bore, means for4 rotating the same, a second sleeve within the Vfirst also having an'eccentric bore and having an outwardly flaring bearing at one end fitting a similar bearing on the other sleeve, a tapered bushing fitting between said sleeves at the opposite end, a nut onthe second sleeve for moving itlongitudinally of the first to compensate for wear, said nut bearing against the outer end Of said tapered bushing to force it between the sleeves, a nut threaded on the bushing adjustably limiting its inward movement a spindle journaled inthe inner sleeve anda grinding wheel carried by the spindle, substantially as set forth; Y

3. In a grinding machine, a sleeve, a spindle eccentrically loca ed therein, `means for varying the eccentricity of the spindle., means to rotate the'spindle, and means to Vrotate the sleeve comprising a pulley, a shaft -geawed thereto, a pulley on the shaft, a belt on the pulley, a driving pulley for the belt, a shaft carryingV the driving pulley, a pivoted bracket in which the shafty is journaled,.adriven gearjon said shaft, a driving las rthe spindle and independent ge;

gear concentric with the pivot of the bracket Y and manually'operated means for moving said bracket to tighten or loosen the 'belt Without disengaging said gears, substantially as set forth. l

l. In a grinning machine, a sleeve, a spindle eccentrically supported therein, means for varying the eccentricity of the spindle, means for driving thespi'ndle and means for driving the slcevefcomprising a driven pulley, gearing' connecting said pulley to the sleeve, a pivoted bracket supporting a driving pulley, a belt connecting said pulleys a toggle for raising the driving pulley to render the drive inoperative, and manually actuated means for operating said toggle, substantially as set forth. l I

y5. ln a grinding machine, a sleeve, a 'horizontal spindle eccentrically located in the sleeve, aV grinding Wheel on the spndle. a maindriving shaft parallel to the spindle, connections from the main sh.' to drive driven from said shaft for driving the sleeve, sul stantially as set forth. l y 6v. In a grinding machine, a rotary sleeve, a spindle carried by thesleeve .and having planetary movement, a grinding` Wheel. on the spindle, a main driving slin below the level of the spindle, connectiedriving one of said rotary members from the main driving shaft including driving" and driven pulleys belovv and alined with said rotary sleeve, a belt connecting. said pulleys'and i gearing connecting thel pulleys,respectively to the Vrotary sleeve and the main shaft, connections for driving the'other rotary niember including a pulley on said member, a pulley on the main shaft, a belt rconnecting said pulleys, and a handwheel fast to the first-named Vdriven pulley proiecting Ybetween the runs of the second-named belt, substantially as set forth.

7. ln a grinding machine, a rotary sleeve, a spindle carded thereby and having a planetary movement, a grinding Wheel on the spindle,` a main shaft below the sleeve and laterali f spaced therefrom a aullev onY the spindle, a driving pulley on the Amain shaft, a belt connecting said driving and driven'pulleys, idlersA to maintain the ten` sion of the belt, a driven pulley beneath 'andv connected to the sleeve, a driving pulley beneath the driven pulley, a belt `connecting them, connections from tlieinain shaft to the second-named driving pulley, and means for interrupting' the drive for the sleeve Without stopping the spindle, substantially as set forth. l

8. In a grinding machine, a sleeve, a spindle eccentrically located in the sleeve', a grinding Wheel on thespindle, a main driving shaft, pulleys on sai'd'shaft andsaid 's indle a belt -on said Qulle 7s for drivin@` Y Y .i Y ,-YX. Y e the spindle, al pivotedbracket adpicenttoV set forth.

the mainshaft, a shaft on the bracket, a

necting the main shaft to the last-named shaft, reducing gearing connected to said sleeve, said reducing gearing including a pulley, a belt ,connecting said pulley to the pulley on the bracket, and manual means for moving said bracket to tighten or slacken the last-named belt, substantially as set forth.

9. In a grinding machine, a sleeve, a spindle eccentricallyY located on 'the sleeve, a grinding Wheel on the spindle, a main driving shaft, pulleys on .said shaft and said spindle, a belt on said pulleys for driving the spindle, a pulley beneath said sleeve approximately on a level With saidmain shaft, connections between said pulley and the main shaft, a pulleyadjacent to the sleeve, a belt connecting the last-named pulleys for driving the sleeve, and means for slacken-V ing the belt to stop the sleeve independently of the spindle, substantially as set forth.

lO. A cylinder grinding machine compris ing a spin-dle, a grinding Wheel thereon, means for driving the spindle, an eccentric sleeve surrounding the spindle, a second eccentric sleeve surrounding the first, and means for driving the second sleeve said sleeves having bores so located as to prevent identification of the respective axesnof r0- tation and revolution of thefspindle, substantially as set forth. Y

1l. An internal grinder comprisinga .spindle, a Wheel thereon, an eccentric sleeve about the spindle, a rotary eccentric sleeve`V about the first-named sleeve, a bearing sleeve about thespindle between said first-named sleeve and said Wheel, a bushing in th-e bearing sleeve, a nut threaded into the outer end of the last-named sleeve said nut abutting against a shoulder on the bushing for forcing it against a Vshoulder on the spindle, and a locknut on the bushing acting against the end'of the-first-named nut, substantially'as l2. An internal spindle, a Wheel thereon, an eccentric sleeve about the spindle, a rotary eccentric sleeve about the first-named sleeve, a bearing lsleeve about the ,spindle between said' first-named sleeve `and said Wheel, a bushing in the bearing sleeve, Wedge movable lengthwise of the spindleV in a Wedge-shaped slot of the. bushing for clamping it in place `inthe sleeve, and means for taking up Wear betvveen the bushing and the spindle, substan tially as set forth. l

18. An internal grinder comprising a spindle, a Wlieel'thereon, an eccentric sleeve.

about the spindle, a rotary eccentric sleeve about the first-named sleeve, a `bearing sleeve about the spindle between said first-namedA sleeve and said Wheel, abusliing in the bear-Y ing,a Wedge movablelengthvvise of the spingrinderr comprising a die in a wedge-shaped slot of the bushing for clamping it in place in the sleeve, and a screw projecting through the bearing sleeve sai-d screw having an eccentric inner end engaging a slot in said wedge rfor actuating the wedge, substantially as set forth.

14. An internal grinder comprising a spindle a wheel thereon, an eccentric sleeve about the spindle, a rotary eccentricjsieeve about the first-named sleeve, a bearing sleeve about the spindle between said first-named sleeve and sai-d wheel, a tapered split bushing in a tapered recess in the bearing sleeve, means to force one end of the bushing against a shoulder on the .spindle whereby the bushing contracts to compensate for wear, and a bearing engaging an opposed shoulder at the opposite end of the spindle with a limited amount ot' 10st motion, as and for the purpose set forth.

In witness whereof, I have hereunto set iny han-d and seal at "Vaynesboro, Pennsyf1vania,` this 14th day of January, A. D. nineteen hundred and twenty-two.

JOHN J. SCHMIDT. [1.. s]

In witness whereof, I have hereunto set my hand and seal at Lima., Ohio, this thirtieth day of December, A. D. nineteen hundred and twenty-one.

ULRICH STEINER. 

